'''NOTE''': There are some errors in the book, and here is the link to the list of corrections: [http://www.cubestation.co.uk/ Cubestation.co.uk (click the picture to the left of the page, and at the bottom there will be a list of corrections.)]

'''NOTE''': There are some errors in the book, and here is the link to the list of corrections: [http://www.cubestation.co.uk/ Cubestation.co.uk (click the picture to the left of the page, and at the bottom there will be a list of corrections.)]